| Value | Category | Cases | |
|---|---|---|---|
| -99 | 15 |
4%
|
|
| 1 | Not effective at all | 2 |
0.5%
|
| 2 | 3 |
0.8%
|
|
| 3 | 4 |
1.1%
|
|
| 4 | 12 |
3.2%
|
|
| 5 | 30 |
8%
|
|
| 6 | 39 |
10.3%
|
|
| 7 | 57 |
15.1%
|
|
| 8 | 56 |
14.9%
|
|
| 9 | 28 |
7.4%
|
|
| 10 | Very effective | 10 |
2.7%
|
| 11 | Don't know | 121 |
32.1%
|
| Sysmiss | 7 |